De Viris Illustribus (On Illustrious Men) is a collection of 135 short biographies of important Church writers from the history of the Christian Church, in St. Jerome's time. It was composed in Latin in Bethlehem by St. Jerome in 392 AD. There is also a Greek version of the book, potentially by Sophronius (Chapter 134). The work was dedicated to Flavius Lucius Dexter, who served as high chamberlain to Emperor Theodosius I. Dexter was also the son of Saint Pacianus, who is included in the work. The book is one of the earliest examples of a collection of the lives of the saints, and provides valuable insight about the early writers and writings of the Church. - Summary from Wikipedia (Translated by Philip Schaff)